H2CO is a polar molecule and will have both dipole-dipole forces and London dispersion forces while CH3CH3 is a non-polar molecule and will only have London dispersions forces.
Is H2CO ionic or covalent bond?
The carbon forms single bond (sigma bond) with the two hydrogen atoms and a double bond (pi bond) with the oxygen atom. All the bond (both sigma and pi bond ) in methanal are Covalent in nature.
What is the molecular shape of H2CO?
The central atom of H2CO, has three regions of electron density around it. The regions of electrons making a trigonal planar shape, giving a bond angle of 120°. All three of these regions of electrons are bonding so the arrangement of the bonds/molecular shape is trigonal planar.
